Derek Smart has recently commented the following elsewhere on the Usergroup Forum as follows:
'Just a quick note to reassure everyone that MYOB does work within MacOS Mavericks.
I am running MYOB Account Edge Plus 2008 (v8) on a new Macbook Pro using MacOS Mavericks (v10.9.1) - no problems at all.
I have updated the OS every time a new version came out and MYOB has run ok with them all. I cannot verify if you would be able to INSTALL an old version of MYOB on a new MAC OS because I believe OSX carries out a few checks before installing and it may report that MYOB is not compatible.
However I can confirm from personal experience that if you have MYOB already installed and running and you upgrade to Mavericks (10.9.1) then MYOB will continue to run without problems.'
This is good news. Clearly Derek has not installed the software afresh onto a new Mavericks machine. So for those wanting to buy new Macs we still have a significant and developing problem.